Remove unused parameters from VCMReceiver::InsertPacket().

BUG=
R=pbos@webrtc.org

Review URL: https://codereview.webrtc.org/2094183004 .

Cr-Commit-Position: refs/heads/master@{#13309}

webrtc/modules/video_coding/receiver.cc

@@ -110,9 +110,7 @@ void VCMReceiver::Process() {
   jitter_buffer_.Process();
 }
 
-int32_t VCMReceiver::InsertPacket(const VCMPacket& packet,
-                                  uint16_t frame_width,
-                                  uint16_t frame_height) {
+int32_t VCMReceiver::InsertPacket(const VCMPacket& packet) {
   // Insert the packet into the jitter buffer. The packet can either be empty or
   // contain media at this point.
   bool retransmitted = false;